| All Patents in class 408/122 |
Patents 1 -
13
of 13
      |
| Number | Date | Patentee | Title | Type |
| 116,847 | Jul. 11, 1871 | J.W. Mahlon | Improvement in ratchet-drills | hand drills |
| 137,432 | Apr. 01, 1873 | B. Gallagher | Improvement in ratchet-drills | ratchet drills |
| 260,359 | Jul. 04, 1882 | C.E. Billings | Ratchet Drill | hand drills |
| 285,733 | Sep. 25, 1883 | C.T. Colebrook | Self-Feeding Ratchet Brace | |
| 329,986 | Nov. 10, 1885 | P.A. Whitney | Ratchet Drill | drilling and boring |
| 400,928 | Apr. 09, 1889 | T.C. Massey | Drill-brace | hand drills |
| 453,537 | Jun. 02, 1891 | F.H. Bates, F.G. Bates | Ratchet Tool | ratchet wrenches |
| 539,423 | May 21, 1895 | J. Emig | Ratchet Drill | hand drills |
| 847,059 | Mar. 12, 1907 | P.F. Gallagher | Ratchet Tool Holder | tool holders |
| 924,901 | Jun. 15, 1909 | J. Gessert | Drill Brace | ratchet drills |
| 1,163,072 | Dec. 07, 1915 | G.O. Leopold, T.J. Fegley | Ratchet drill | ratchet drills |
| 1,562,862 | Nov. 24, 1925 | C. Bodmer | Ratchet screw driver | ratcheting screwdrivers |
| 2,301,413 | Nov. 10, 1942 | D.K. Kilcup | Drive mechanism | spiral screwdrivers |
